Solving prefix expression using two stacks

Question

I have to solve a prefix expression use two stacks (one for the operator, and one for the operand).
The code is reading the equation and evaluating it wrong and I just can't figure it out.
(and YES I have to solve it from left to right).

https://code.sololearn.com/c0nvdjIbAQuF/?ref=app

Answer 1

Ah, I see. I fixed it, thanks for letting me know.